When first bought, this shield will only have 20% charge remaining. Once it reaches 0%, it can be recharged for 2,000,000gp or 200,000gp and 20,000 Dungeoneering reward tokens. From 100%, it will last for 10 hours of combat before degrading back to 0%.

If you no longer want this shield, then you have the option to destroy it to reclaim 100,000 tokens.